We report here an efficient non-aqueous route to symmetrical disiloxanes from their corresponding organosilanes using Ni(COD)2 with 3,4,7,8-tetramethyl-1,10-phenanthroline in air. Our methodology is very simple and high yielding. The reaction mechanism is also proposed.
Aryl-Aryl Bond Formation by the Fluoride-Free Cross-Coupling of Aryldisiloxanes with Aryl Bromides
作者:Christine M. Boehner、Elizabeth C. Frye、Kieron M. G. O'Connell、Warren R. J. D. Galloway、Hannah F. Sore、Patricia Garcia Dominguez、David Norton、David G. Hulcoop、Martin Owen、Gillian Turner、Claire Crawford、Helen Horsley、David R. Spring
DOI:10.1002/chem.201102285
日期:2011.11.18
synthetically important molecules has inspired considerable interest in the development of methods for aryl–arylbondformation. Herein we describe a novel strategy for this process involving the fluoride‐free, palladium‐catalysed cross‐coupling of readily accessible aryldisiloxanes and arylbromides. Using a statistical‐based optimisation process, preparatively useful reaction conditions were formulated
A synthesis of siloxanes via visible-light-induced oxidation of silanes with SF6 has been established, exhibiting broad substrate scope and high efficiency.